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| Product Name | Streptavidin (Streptomyces avidinii) |
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| Description | Highly Purified (~95%). Streptavidin is a 53kD tetrameric protein purified from the bacterium Streptomyces avidinii. It finds wide uses in immunoassay and molecular biology due to its extraordinarily strong affinity for the vitamin biotin; the dissociation constant (Kd) of the biotin-streptavidin complex is on the order of ~10-15mol/L, ranking among one of the strongest known non-covalent interactions. There are considerable differences in the composition of avidin (found in egg white) and streptavidin, but they are remarkably similar in other respects. Both proteins form tetrameric complexes to function in which each subunit can bind one molecule of biotin. Streptavidin is much less soluble in water than avidin, and it lacks avidin's extensive glycosylation. Streptavidin has a mildly acidic isoelectric point (pI) of ~5. Because streptavidin lacks any carbohydrate modification and has a near-neutral pI, it has the advantage of much lower nonspecific binding than avidin. Deglycosylated |
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| Size | 1mg, 5mg |
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| Concentration | n/a |
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| Applications | n/a |
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| Other Names | n/a |
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| Gene, Accession, CAS # | n/a |
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| Catalog # | 209209 |
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| Price | |
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| Order / More Info | Streptavidin (Streptomyces avidinii) from UNITED STATES BIOLOGICAL |
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| Product Specific References | n/a |
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